Website Visitor Identification Tools

What visitor identification does (and doesn't) do

Visitor identification tools use reverse-IP lookup, cookie graphs, and first-party data partnerships to reveal which companies are on your site in real time. The best tools now also resolve which people for a subset of traffic — typically 5-15% person-level, 30-65% company-level. The rest stays anonymous no matter what any vendor claims, because mobile, VPN, and residential ISP traffic can't be resolved without explicit consent.

This category is worth paying for once three conditions hold at once: (1) your traffic is at least 5,000 monthly visitors from ICP-fit companies, (2) you have a sales motion capable of acting on signal within minutes, and (3) your CRM can accept enriched account data without duplicating records. Below 5,000 ICP-fit sessions, you're paying to identify visitors you can't meaningfully work.

How to choose: prioritize ID rate for US-based B2B traffic, Slack/CRM routing depth, and whether the tool can also trigger outbound (Warmly can, RB2B can't). Pricing ranges from $1K/mo (RB2B, person-level US-only) to $50K+/yr (6sense, enterprise intent platform).